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CVE Record

CVE-2020-27402: The HK1 Box S905X3 TV Box contains a vulnerability that allows a local unprivileged user to escalate to roo...

The HK1 Box S905X3 TV Box contains a vulnerability that allows a local unprivileged user to escalate to root using the /system/xbin/su binary via a serial port (UART) connection or using adb.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2020-27402 is a local privilege escalation issue reported in the HK1 Box S905X3 TV Box. A person with local unprivileged access, through UART serial access or ADB, may gain root privileges via the device's su binary. This matters most where these boxes are connected to business networks or trusted displays.

Executive priority

Treat this as a targeted device-risk issue, not a broad enterprise emergency. Prioritize environments where Android TV boxes sit on trusted networks, display sensitive content, or are physically accessible to visitors, contractors, or shared-space users.

Technical view

The CVE description identifies /system/xbin/su on the HK1 Box S905X3 TV Box as the privilege escalation path. The published data does not provide CVSS, CWE, precise firmware versions, or a vendor patch. The attack surface is local or device-management access, not a documented remote network exploit.

Likely exposure

Exposure is likely limited to organizations that deployed HK1 Box S905X3 TV Boxes or closely related firmware images, especially where ADB, developer access, USB, or UART access is available. The source bundle does not identify broader affected products or versions.

Exploitation context

The provided sources do not show CISA KEV listing or active exploitation. The described abuse requires local unprivileged access through UART serial connection or ADB, then root escalation through the su binary. Public data is sparse and should be treated as incomplete.

Researcher notes

The record lacks CVSS, CWE, detailed versioning, and confirmed remediation. Keep findings narrowly scoped to HK1 Box S905X3 unless additional evidence links related devices or firmware. Avoid assuming remote exploitability; the described vectors are UART and ADB local access.

Mitigation direction

  • Inventory HK1 Box S905X3 devices on corporate or operational networks.
  • Disable ADB and developer access where operationally possible.
  • Physically restrict USB, UART, and maintenance port access.
  • Check vendor or firmware maintainer guidance for updates or hardening.
  • Isolate affected TV boxes from sensitive systems and management networks.
  • Replace unsupported devices if no trustworthy firmware fix exists.

Validation and detection

  • Confirm whether HK1 Box S905X3 devices are present in the environment.
  • Review firmware and system image details against the cited advisory.
  • Check whether ADB or developer options are enabled.
  • Verify physical access controls around USB and UART ports.
  • Review whether /system/xbin/su exists using approved administrative access.
  • Document whether any vendor-supported firmware update is available.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2020-27402 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.